我正在寻找一种将多个订户附加到RxJava Observable流的方法,每个订户都异步处理发出的事件。

我首先尝试使用.flatMap(),但似乎不适用于任何后续订阅者。所有订阅者都在同一线程上处理事件。

.flatMap(s -> Observable.just(s).subscribeOn(Schedulers.newThread()))


最终的工作是通过每次创建一个新的Observable来消耗新线程中的每个事件:

Observable.from(Arrays.asList(new String[]{"1", "2", "3"}))
            .subscribe(j -> {
                Observable.just(j)
                        .subscribeOn(Schedulers.newThread())
                        .subscribe(i -> {
                            try {
                                Thread.sleep(ThreadLocalRandom.current().nextInt(100, 500));
                            } catch (InterruptedException e) {
                                e.printStackTrace();
                            }
                            System.out.println("s1=>" + Thread.currentThread().getName() + "=>" + i);
                        });
            });


输出:

s1=>RxNewThreadScheduler-1=>1
s1=>RxNewThreadScheduler-2=>2
s1=>RxNewThreadScheduler-3=>3


最终有多个订阅者:

ConnectableObservable<String> e = Observable.from(Arrays.asList(new String[]{"1", "2", "3"}))
            .publish();

    e.subscribe(j -> {
        Observable.just(j)
                .subscribeOn(Schedulers.newThread())
                .subscribe(i -> {
                    try {
                        Thread.sleep(ThreadLocalRandom.current().nextInt(100, 500));
                    } catch (InterruptedException e1) {
                        e1.printStackTrace();
                    }
                    System.out.println("s1=>" + Thread.currentThread().getName() + "=>" + i);
                });
    });

    e.subscribe(j -> {
        Observable.just(j)
                .subscribeOn(Schedulers.newThread())
                .subscribe(i -> {
                    try {
                        Thread.sleep(ThreadLocalRandom.current().nextInt(100, 500));
                    } catch (InterruptedException e1) {
                        e1.printStackTrace();
                    }
                    System.out.println("s2=>" + Thread.currentThread().getName() + "=>" + i);
                });
    });

    e.connect();


输出:

s2=>RxNewThreadScheduler-4=>2
s1=>RxNewThreadScheduler-1=>1
s1=>RxNewThreadScheduler-3=>2
s2=>RxNewThreadScheduler-6=>3
s2=>RxNewThreadScheduler-2=>1
s1=>RxNewThreadScheduler-5=>3


但是,这似乎有些笨拙。有没有更优雅的解决方案,还是RxJava并不是一个很好的用例?

最佳答案

使用.flatMap(s -> Observable.just(s).observeOn(Schedulers.newThread())....)

08-18 16:04